Thus the national grievance vanished, and national feeling resumed its sway in England; the French everywhere became unpopular; and after a few months' struggle, with equal want of skill and success, Prince Louis gave up his enterprise and returned to France with his French comrades, on no other conditions but a mutual exchange of prisoners, and an amnesty for the English who had been his adherents.
At this juncture, as well as in the crusade against the Albigensians, Philip Augustus behaved towards the pope with a wisdom and ability hard of attainment at any time, and very rare in his own: he constantly humored the papacy without being subservient to it, and he testified towards it his respect, and at the same time his independence.

He understood all the gravity of a rupture with Rome, and he neglected nothing to avoid one; but he also considered that Rome, herself not wanting in discretion, would be content with the deference of the King of France rather than get embroiled with him by exacting his submission.
Philip Augustus, in his political life, always preserved this proper mean, and he found it succeed; but in his domestic life there came a day when he suffered himself to be hurried out of his usual deference towards the pope; and, after a violent attempt at resistance, he resigned himself to submission.

Three years after the death of his first wife, Isabel of Hainault, who had left him a son, Prince Louis, he married Princess Ingeburga of Denmark, without knowing anything at all of her, just as it generally happens in the case of royal marriages.

No sooner had she become his wife than, without any cause that can be assigned with certainty, he took such a dislike to her that, towards the end of the same year, he demanded of and succeeded in obtaining from a French council, held at Compiegne, nullity of his marriage on the ground of prohibited consanguinity.

"O, naughty France! naughty France! O, Rome! Rome!" cried the poor Danish princess, on learning this decision; and she did in fact appeal to Pope Celestine III.